2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
6 mainmenu "IA-64 Linux Kernel Configuration"
10 menu "Processor type and features"
14 select PCI if (!IA64_HP_SIM)
15 select ACPI if (!IA64_HP_SIM)
16 select PM if (!IA64_HP_SIM)
17 select ARCH_SUPPORTS_MSI
21 select HAVE_KRETPROBES
26 The Itanium Processor Family is Intel's 64-bit successor to
27 the 32-bit X86 line. The IA-64 Linux project has a home
28 page at <http://www.linuxia64.org/> and a mailing list at
29 <linux-ia64@vger.kernel.org>.
33 select ATA_NONSTANDARD if ATA
38 depends on !IA64_SGI_SN2
54 config GENERIC_LOCKBREAK
57 depends on SMP && PREEMPT
59 config RWSEM_XCHGADD_ALGORITHM
63 config HUGETLB_PAGE_SIZE_VARIABLE
65 depends on HUGETLB_PAGE
68 config GENERIC_FIND_NEXT_BIT
72 config GENERIC_CALIBRATE_DELAY
80 config GENERIC_TIME_VSYSCALL
84 config HAVE_SETUP_PER_CPU_AREA
99 config SCHED_NO_NO_OMIT_FRAME_POINTER
103 config IA64_UNCACHED_ALLOCATOR
105 select GENERIC_ALLOCATOR
111 menuconfig PARAVIRT_GUEST
112 bool "Paravirtualized guest support"
114 Say Y here to get to see options related to running Linux under
115 various hypervisors. This option alone does not add any kernel code.
117 If you say N, all options in this submenu will be skipped and disabled.
122 bool "Enable paravirtualization code"
123 depends on PARAVIRT_GUEST
128 This changes the kernel so it can modify itself when it is run
129 under a hypervisor, potentially improving performance significantly
130 over full virtualization. However, when run without a hypervisor
131 the kernel is theoretically slower and slightly larger.
134 source "arch/ia64/xen/Kconfig"
148 This selects the system type of your hardware. A "generic" kernel
149 will run on any supported IA-64 system. However, if you configure
150 a kernel for your specific system, it will be faster and smaller.
152 generic For any supported IA-64 system
153 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
154 HP-zx1/sx1000 For HP systems
155 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
156 SGI-SN2 For SGI Altix systems
157 SGI-UV For SGI UV systems
158 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
159 Xen-domU For xen domU system
161 If you don't know what to do, choose "generic".
170 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
171 support for the HP I/O MMU.
173 config IA64_HP_ZX1_SWIOTLB
174 bool "HP-zx1/sx1000 with software I/O TLB"
177 Build a kernel that runs on HP zx1 and sx1000 systems even when they
178 have broken PCI devices which cannot DMA to full 32 bits. Apart
179 from support for the HP I/O MMU, this includes support for the software
180 I/O TLB, which allows supporting the broken devices at the expense of
181 wasting some kernel memory (about 2MB by default).
188 Selecting this option will optimize the kernel for use on sn2 based
189 systems, but the resulting kernel binary will not run on other
190 types of ia64 systems. If you have an SGI Altix system, it's safe
191 to select this option. If in doubt, select ia64 generic support
200 Selecting this option will optimize the kernel for use on UV based
201 systems, but the resulting kernel binary will not run on other
202 types of ia64 systems. If you have an SGI UV system, it's safe
203 to select this option. If in doubt, select ia64 generic support
210 config IA64_XEN_GUEST
217 prompt "Processor type"
223 Select your IA-64 processor type. The default is Itanium.
224 This choice is safe for all IA-64 systems, but may not perform
225 optimally on systems with, say, Itanium 2 or newer processors.
230 Select this to configure for an Itanium 2 (McKinley) processor.
235 prompt "Kernel page size"
236 default IA64_PAGE_SIZE_16KB
238 config IA64_PAGE_SIZE_4KB
241 This lets you select the page size of the kernel. For best IA-64
242 performance, a page size of 8KB or 16KB is recommended. For best
243 IA-32 compatibility, a page size of 4KB should be selected (the vast
244 majority of IA-32 binaries work perfectly fine with a larger page
245 size). For Itanium 2 or newer systems, a page size of 64KB can also
248 4KB For best IA-32 compatibility
249 8KB For best IA-64 performance
250 16KB For best IA-64 performance
251 64KB Requires Itanium 2 or newer processor.
253 If you don't know what to do, choose 16KB.
255 config IA64_PAGE_SIZE_8KB
258 config IA64_PAGE_SIZE_16KB
261 config IA64_PAGE_SIZE_64KB
268 prompt "Page Table Levels"
275 depends on !IA64_PAGE_SIZE_64KB
286 source kernel/Kconfig.hz
294 # align cache-sensitive data to 128 bytes
295 config IA64_L1_CACHE_SHIFT
297 default "7" if MCKINLEY
298 default "6" if ITANIUM
301 bool "Cyclone (EXA) Time Source support"
303 Say Y here to enable support for IBM EXA Cyclone time source.
304 If you're unsure, answer N.
308 depends on !IA64_HP_SIM
311 config FORCE_MAX_ZONEORDER
312 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
313 range 11 17 if !HUGETLB_PAGE
314 default "17" if HUGETLB_PAGE
317 config VIRT_CPU_ACCOUNTING
318 bool "Deterministic task and CPU time accounting"
321 Select this option to enable more accurate task and CPU time
322 accounting. This is done by reading a CPU counter on each
323 kernel entry and exit and on transitions within the kernel
324 between system, softirq and hardirq state, so there is a
325 small performance impact.
326 If in doubt, say N here.
329 bool "Symmetric multi-processing support"
330 select USE_GENERIC_SMP_HELPERS
332 This enables support for systems with more than one CPU. If you have
333 a system with only one CPU, say N. If you have a system with more
336 If you say N here, the kernel will run on single and multiprocessor
337 systems, but will use only one CPU of a multiprocessor system. If
338 you say Y here, the kernel will run on many, but not all,
339 single processor systems. On a single processor system, the kernel
340 will run faster if you say N here.
342 See also the SMP-HOWTO available at
343 <http://www.tldp.org/docs.html#howto>.
345 If you don't know what to do here, say N.
348 int "Maximum number of CPUs (2-4096)"
353 You should set this to the number of CPUs in your system, but
354 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
355 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
356 than 64 will cause the use of a CPU mask array, causing a small
360 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
361 depends on SMP && EXPERIMENTAL
365 Say Y here to experiment with turning CPUs off and on. CPUs
366 can be controlled through /sys/devices/system/cpu/cpu#.
367 Say N if you want to disable CPU hotplug.
369 config ARCH_ENABLE_MEMORY_HOTPLUG
372 config ARCH_ENABLE_MEMORY_HOTREMOVE
376 bool "SMT scheduler support"
379 Improves the CPU scheduler's decision making when dealing with
380 Intel IA64 chips with MultiThreading at a cost of slightly increased
381 overhead in some places. If unsure say N here.
383 config PERMIT_BSP_REMOVE
384 bool "Support removal of Bootstrap Processor"
385 depends on HOTPLUG_CPU
388 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
391 config FORCE_CPEI_RETARGET
392 bool "Force assumption that CPEI can be re-targetted"
393 depends on PERMIT_BSP_REMOVE
396 Say Y if you need to force the assumption that CPEI can be re-targetted to
397 any cpu in the system. This hint is available via ACPI 3.0 specifications.
398 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
399 This option it useful to enable this feature on older BIOS's as well.
400 You can also enable this by using boot command line option force_cpei=1.
402 source "kernel/Kconfig.preempt"
406 config ARCH_SELECT_MEMORY_MODEL
409 config ARCH_DISCONTIGMEM_ENABLE
412 Say Y to support efficient handling of discontiguous physical memory,
413 for architectures which are either NUMA (Non-Uniform Memory Access)
414 or have huge holes in the physical address space for other reasons.
415 See <file:Documentation/vm/numa> for more.
417 config ARCH_FLATMEM_ENABLE
420 config ARCH_SPARSEMEM_ENABLE
422 depends on ARCH_DISCONTIGMEM_ENABLE
423 select SPARSEMEM_VMEMMAP_ENABLE
425 config ARCH_DISCONTIGMEM_DEFAULT
426 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
427 depends on ARCH_DISCONTIGMEM_ENABLE
431 depends on !IA64_HP_SIM && !FLATMEM
432 default y if IA64_SGI_SN2
433 select ACPI_NUMA if ACPI
435 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
436 Access). This option is for configuring high-end multiprocessor
437 server systems. If in doubt, say N.
440 int "Max num nodes shift(3-10)"
443 depends on NEED_MULTIPLE_NODES
445 This option specifies the maximum number of nodes in your SSI system.
446 MAX_NUMNODES will be 2^(This value).
447 If in doubt, use the default.
449 config ARCH_POPULATES_NODE_MAP
452 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
453 # VIRTUAL_MEM_MAP has been retained for historical reasons.
454 config VIRTUAL_MEM_MAP
455 bool "Virtual mem map"
456 depends on !SPARSEMEM
457 default y if !IA64_HP_SIM
459 Say Y to compile the kernel with support for a virtual mem map.
460 This code also only takes effect if a memory hole of greater than
461 1 Gb is found during boot. You must turn this option on if you
462 require the DISCONTIGMEM option for your machine. If you are
467 default y if VIRTUAL_MEM_MAP
469 config HAVE_ARCH_EARLY_PFN_TO_NID
471 depends on NEED_MULTIPLE_NODES
473 config HAVE_ARCH_NODEDATA_EXTENSION
478 bool "Support for Linux/x86 binaries"
480 IA-64 processors can execute IA-32 (X86) instructions. By
481 saying Y here, the kernel will include IA-32 system call
482 emulation support which makes it possible to transparently
483 run IA-32 Linux binaries on an IA-64 Linux system.
488 depends on IA32_SUPPORT
491 config COMPAT_FOR_U64_ALIGNMENT
494 config IA64_MCA_RECOVERY
495 tristate "MCA recovery from errors other than TLB."
498 bool "Performance monitor support"
500 Selects whether support for the IA-64 performance monitor hardware
501 is included in the kernel. This makes some kernel data-structures a
502 little bigger and slows down execution a bit, but it is generally
503 a good idea to turn this on. If you're unsure, say Y.
506 tristate "/proc/pal support"
508 If you say Y here, you are able to get PAL (Processor Abstraction
509 Layer) information in /proc/pal. This contains useful information
510 about the processors in your systems, such as cache and TLB sizes
511 and the PAL firmware version in use.
513 To use this option, you have to ensure that the "/proc file system
514 support" (CONFIG_PROC_FS) is enabled, too.
516 config IA64_MC_ERR_INJECT
517 tristate "MC error injection support"
519 Adds support for MC error injection. If enabled, the kernel
520 will provide a sysfs interface for user applications to
521 call MC error injection PAL procedures to inject various errors.
522 This is a useful tool for MCA testing.
524 If you're unsure, do not select this option.
527 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
530 bool "ESI (Extensible SAL Interface) support"
532 If you say Y here, support is built into the kernel to
533 make ESI calls. ESI calls are used to support vendor-specific
534 firmware extensions, such as the ability to inject memory-errors
535 for test-purposes. If you're unsure, say N.
537 config IA64_HP_AML_NFW
538 bool "Support ACPI AML calls to native firmware"
540 This driver installs a global ACPI Operation Region handler for
541 region 0xA1. AML methods can use this OpRegion to call arbitrary
542 native firmware functions. The driver installs the OpRegion
543 handler if there is an HPQ5001 device or if the user supplies
544 the "force" module parameter, e.g., with the "aml_nfw.force"
545 kernel command line option.
547 source "drivers/sn/Kconfig"
550 bool "kexec system call (EXPERIMENTAL)"
551 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
553 kexec is a system call that implements the ability to shutdown your
554 current kernel, and to start another kernel. It is like a reboot
555 but it is independent of the system firmware. And like a reboot
556 you can start any kernel with it, not just Linux.
558 The name comes from the similarity to the exec system call.
560 It is an ongoing process to be certain the hardware in a machine
561 is properly shutdown, so do not be surprised if this code does not
562 initially work for you. It may help to enable device hotplugging
563 support. As of this writing the exact hardware interface is
564 strongly in flux, so no good recommendation can be made.
567 bool "kernel crash dumps"
568 depends on IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
570 Generate crash dump after being started by kexec.
572 source "drivers/firmware/Kconfig"
574 source "fs/Kconfig.binfmt"
578 menu "Power management and ACPI"
580 source "kernel/power/Kconfig"
582 source "drivers/acpi/Kconfig"
586 source "arch/ia64/kernel/cpufreq/Kconfig"
594 menu "Bus options (PCI, PCMCIA)"
599 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
600 here unless you are using a simulator without PCI support.
608 source "drivers/pci/pcie/Kconfig"
610 source "drivers/pci/Kconfig"
612 source "drivers/pci/hotplug/Kconfig"
614 source "drivers/pcmcia/Kconfig"
622 source "drivers/Kconfig"
625 tristate "Memory special operations driver"
627 select IA64_UNCACHED_ALLOCATOR
629 If you have an ia64 and you want to enable memory special
630 operations support (formerly known as fetchop), say Y here,
635 source "arch/ia64/kvm/Kconfig"
640 # Use the generic interrupt handling code in kernel/irq/:
642 config GENERIC_HARDIRQS
646 config GENERIC_IRQ_PROBE
650 config GENERIC_PENDING_IRQ
652 depends on GENERIC_HARDIRQS && SMP
660 def_bool (IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB || IA64_GENERIC || SWIOTLB)
662 source "arch/ia64/hp/sim/Kconfig"
664 source "arch/ia64/Kconfig.debug"
666 source "security/Kconfig"
668 source "crypto/Kconfig"